A downhole tool assisted disassembly device

Abstract

The utility model belongs to installation and detach the dismounting device technical field of spare part and the cooperation spare part of being dismantled and cooperate, specifically relates to a kind of auxiliary dismounting device of downhole tool.The auxiliary dismounting device of downhole tool includes annular support and several pressure tight members, each the pressure tight member is evenly distributed along the circumferential direction of annular support and is radially movably arranged on the annular support, the annular support is evenly distributed with the chucking member for being fixed relative to the downhole tool, and the chucking member is radially movably arranged along the annular support.In use, by flexibly adjusting the radial position of chucking member, the relative fixation of downhole tool and the annular support of auxiliary dismounting device is realized, the displacement or slip of annular support during the dismounting process of downhole tool is prevented, the stability of auxiliary dismounting device and downhole tool connection during the dismounting process of downhole tool is guaranteed, and the dismounting efficiency of downhole tool is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of disassembly and assembly devices for installing and disassembling parts to be disassembled and their mating parts, and specifically relates to an auxiliary disassembly and assembly device for downhole tools. Background Technology

[0002] Downhole tools are indispensable devices for oilfield production operations and enhancement measures. They enable the sealing of different oil-water or gas layers, tubing string opening and closing, release, and retrieval operations. They are essential tools to meet the requirements of various oil and gas production processes such as water injection, water shut-off, acidizing, and fracturing. Examples include hydraulic anchors, wellbore scrapers, and Y221 packers. Taking a hydraulic anchor as an example, it is a device to prevent the downhole tubing from moving upwards due to high well pressure. It generally includes an anchor body, anchor claws, springs, and pressure plates. The anchor body has a vertically extending central flow channel for connecting to the tubing. Multiple radial through holes are evenly distributed around the circumference of the anchor body. The anchor claws are installed in the radial through holes and can reciprocate along the radial direction of the anchor body. The pressure plates are detachably installed outside the radial through holes. A spring groove is opened on the anchor claw opposite the pressure plate, and a spring is press-fitted between the spring groove and the pressure plate. When the pressure inside the well is high, the anchor claws extend outward under the action of the liquid pressure, clamping the inner wall of the casing to achieve the anchoring action and prevent the tubing string from moving upward due to the high pressure inside the well; when the pressure of the tubing and casing is balanced, the anchor claws retract under the action of the spring force, releasing the anchoring effect.

[0003] When disassembling, inspecting, or repairing hydraulic anchors, if the anchor claws are not effectively secured, the pressure plate will tend to pop outwards under the preload of the spring during the removal of the fastening bolts. This poses a risk of the pressure plate suddenly flying out and directly threatening the personal safety of the operators. Therefore, when disassembling and assembling hydraulic anchors, wire or other binding materials are often used to restrict the popping parts, such as the anchor claws, to a retracted state. However, this binding method is time-consuming and labor-intensive, and is prone to loosening, affecting subsequent operations.

[0004] To address the aforementioned issues, Chinese utility model patent CN202985496U, published on June 12, 2013, discloses a hydraulic anchor disassembly device. This device includes a ring-shaped support member with at least three support rods evenly distributed on it for pressing down on the hydraulic anchor claws. The support rods are radially movable, and pressure blocks are provided at the contact points between the support rods and the anchor claws. While this solution reliably restricts the ejected anchor claws, the support member and the hydraulic anchor body to be disassembled are relatively fixed. During the disassembly and assembly of the components on the hydraulic anchor, alignment between the support member and the anchor body is difficult. Furthermore, the synchronous movement of the components and the anchor body causes the support member to move, resulting in poor stability during disassembly and assembly. The already adjusted alignment of the support member and the anchor body changes, requiring repeated restraint of the anchor claws, thus affecting work efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide an auxiliary disassembly and assembly device for downhole tools, so as to solve the problem that the existing auxiliary disassembly and assembly tools lack connection with the downhole tools, and the disassembly and assembly tools move relative to the downhole tools during the disassembly and assembly of downhole tools with pop-out parts, resulting in poor stability of the disassembly and assembly process.

[0006] To achieve the above objectives, the downhole tool auxiliary disassembly and assembly device of this utility model adopts the following technical solution: A downhole tool assisted assembly and disassembly device includes an annular support member with an inner diameter larger than the outer diameter of the downhole tool and a plurality of clamping members. Each of the clamping members is evenly distributed along the circumference of the annular support member and is radially movable through the annular support member. The annular support member is evenly distributed with clamping members for fixing it relative to the downhole tool, and the clamping members are radially movable along the annular support member.

[0007] Furthermore, the downhole tool auxiliary assembly and disassembly device also includes an auxiliary frame for supporting the annular support member. The auxiliary frame includes a base, and the base is provided with a support column corresponding to the clamping member. The annular support member is connected to the support column through the clamping member.

[0008] Furthermore, the base is provided with a center rod for aligning the downhole tool with respect to the annular support.

[0009] Furthermore, the center rod is fitted with a positioning sleeve for axial positioning of the downhole tool.

[0010] Furthermore, the support column has several adjustment holes distributed along its axial direction.

[0011] Furthermore, the circumference of the contact surface between each supporting column and the annular support is adapted to the outer circumferential surface of the annular support.

[0012] Furthermore, the clamping component is a screw, and the annular support component is provided with a threaded hole, through which the clamping component is connected to the annular support component.

[0013] Furthermore, at least three clamping members are provided, each clamping member being evenly distributed along the circumference of the annular support member and spaced apart from the pressing member.

[0014] Furthermore, the clamping member has a top pressure end that extends into the annular support member and is used to clamp and engage with the ejection part of the downhole tool, and an operating end that extends out of the outer peripheral wall of the annular support member, the operating end being provided with an operating handle.

[0015] Furthermore, the number of clamping components is adapted to the number of ejection components of the downhole tool.

[0016] The beneficial effects of this utility model are as follows: The downhole tool auxiliary assembly / disassembly device provided by this utility model is an improvement on the existing technology. During use, by flexibly adjusting the radial position of the clamping component, the downhole tool and the annular support component of the auxiliary assembly / disassembly device are relatively fixed, preventing displacement or slippage of the annular support component during the assembly / disassembly process. This ensures the stability of the connection between the auxiliary assembly / disassembly device and the downhole tool during the assembly / disassembly process, and improves the efficiency of downhole tool assembly / disassembly. The clamping component is radially movable along the annular support component, which can adapt to downhole tools of different specifications, improving the versatility and adaptability of this device. Attached Figure Description

[0017] Figure 1 This is a front view of the downhole tool auxiliary disassembly and assembly device of this utility model; Figure 2 This is a top view of the downhole tool auxiliary disassembly and assembly device (removal auxiliary frame) of this utility model; Figure 3 This is a front view of the auxiliary frame of the downhole tool assembly and disassembly device of this utility model.

[0018] In the diagram: 1. Ring support; 11. Clamping component; 12. Pressing component; 121. Operating handle; 2. Auxiliary frame; 21. Base; 22. Support column; 23. Center rod; 24. Positioning sleeve. Detailed Implementation

[0019] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0020] To address the problem of poor stability during the disassembly and assembly of downhole tools due to the lack of connection between existing auxiliary disassembly and assembly tools and downhole tools with pop-out components, this utility model provides an auxiliary disassembly and assembly device for downhole tools. By setting a clamping component, the downhole tool and the auxiliary disassembly and assembly device are relatively fixed, thereby ensuring the stability of the auxiliary disassembly and assembly device when disassembling and assembling downhole tools.

[0021] An embodiment of the downhole tool auxiliary assembly / disassembly device of this utility model: like Figure 1 and Figure 2As shown, the downhole tool auxiliary disassembly and assembly device provided by this utility model includes an annular support 1 adapted to the outer circumferential surface of the downhole tool, and a plurality of clamping members 12 for pressing the downhole tool ejection component. Each clamping member 12 is evenly distributed along the circumference of the annular support 1 and is radially movably inserted into the annular support 1. The inner diameter of the annular support 1 is larger than the outer diameter of the downhole tool, so that the annular support 1 can be easily fitted onto the outside of the downhole tool during use. The annular support 1 has a threaded hole that passes through it radially for inserting the clamping members 12. By pressing the downhole tool ejection component with the clamping members 12, the ejection component is prevented from ejecting during disassembly and assembly, thus avoiding interference with the disassembly and assembly of the downhole tool.

[0022] The clamping member 12 is a clamping screw, having a top pressure end that extends into the annular support member 1 for clamping with the ejection part of the downhole tool, and an operating end that extends out of the outer peripheral wall of the annular support member 1. The operating end is provided with an operating handle 121. When it is necessary to clamp the ejection part of the downhole tool, the clamping member 12 passes through the threaded hole of the annular support member 1. By rotating the operating handle 121, the clamping member 12 moves radially along the annular support member 1 toward the downhole tool, and the top pressure end presses the ejection part into the downhole tool. When the downhole tool is disassembled and assembled, the top pressure on the elastic part can be released by rotating the operating handle 121 in the opposite direction. In this embodiment, six clamping members 12 are provided. It should be understood that the number of clamping members 12 can be three or other suitable numbers, depending on the number and position of the pop-out parts of the downhole tool. This ensures that each pop-out part has a corresponding clamping member 12 for restraint. At the same time, the circumferential position of the clamping member 12 on the annular support 1 corresponds one-to-one with the position of the pop-out part. During operation, only one clamping member 12 needs to be aligned with the pop-out part, and the other clamping members 12 can be aligned with the target pop-out part simultaneously, reducing the alignment time of the operator. It also further avoids pressure deviation during disassembly, which may cause the pop-out part to jam or be damaged.

[0023] The downhole tool auxiliary assembly / disassembly device also includes a clamping member 11 for fixing the annular support 1 relative to the downhole tool. The clamping member 11 is movably arranged radially along the annular support 1. During use, by flexibly adjusting the radial position of the clamping member 11, a reliable connection between the downhole tool and the annular support 1 of the auxiliary assembly / disassembly device is achieved, preventing displacement or slippage of the annular support 1 during the assembly / disassembly process. This ensures the stability of the connection between the auxiliary assembly / disassembly device and the downhole tool during assembly / disassembly, and improves the efficiency of downhole tool assembly / disassembly. The radial movability of the clamping member 11 along the annular support 1 allows it to adapt to downhole tools of different specifications, improving the versatility and adaptability of the device.

[0024] The clamping component 11 is specifically a fastening screw. The annular support 1 has a threaded hole that runs radially through it, and the fastening screw is connected to the annular support 1 through this threaded hole. The clamping component 11 and the annular support rod are connected by threads. When the clamping component 11 is tightened, it can press against the outer wall of the downhole tool. The threaded structure of the clamping component 11 prevents loosening, thereby achieving a reliable connection between the annular support 1 and the downhole tool. At the same time, it allows for fine adjustment of the tightening force of the clamping component 11, preventing the annular support 1 from shifting or falling off during disassembly and assembly, and enhancing the stability of the connection between the annular support 1 and the downhole tool during disassembly.

[0025] Three clamping components 11 are specifically configured, evenly distributed along the circumference of the annular support 1, with an included angle of 120° between adjacent clamping components 11, and spaced apart from the clamping components 12. The clamping components 11, evenly distributed along the circumference of the annular support 1, form a stable limiting support structure, effectively restricting the relative rotation and movement of the annular support 1 and the downhole tool, ensuring operational stability during assembly and disassembly. The clamping components 11 and the clamping components 12 are staggered along the circumference of the annular support 1 to avoid mutual interference during operation and improve operational efficiency. It should be understood that the number of clamping components 11 can be one, two, or six, etc., depending on actual needs, to ensure a secure connection between the annular support 1 and the downhole tool.

[0026] like Figure 1 and Figure 3 As shown, the downhole tool assembly and disassembly auxiliary device also includes an auxiliary frame 2 for supporting the annular support 1. The auxiliary frame 2 includes a base 21, on which support columns 22 corresponding to the clamping members 11 are provided. The annular support 1 is connected to the support columns 22 through the clamping members 11. Specifically, the base 21 has a circular structure, and the support columns 22 are evenly distributed along the circumference of the base 21 and correspond one-to-one with the clamping members 11. The circumference of the contact surface between each support column 22 and the annular support 1 is adapted to the outer circumferential surface of the annular support 1. It should be understood that the number and arrangement of the support columns 22 are adapted to the number and arrangement of the clamping members 11. The support columns 22 are evenly distributed around the base 21, and their number corresponds to the clamping components 11. They can limit the movement of the annular support 1 at multiple points from its outer circumference, ensuring that the center of the annular support 1 is completely aligned with the center of the base 21 and the center of the tool. The circumference of the contact surface between the support columns 22 and the annular support 1 is adapted to the outer circumference of the annular support 1. When the two are in contact, they can restrict the radial movement of the annular support 1, improving the stability and safety of the device during use. The clamping components 11 radially lock the annular support 1 to the downhole tool and axially connect the annular support 1 to the support columns 22 of the auxiliary frame 2, preventing the annular support 1 from moving radially relative to the downhole tool or axially relative to the auxiliary frame 2. This forms a dual constraint of radial and axial forces, improving the overall stability of the device.

[0027] To facilitate the adaptation of this device to downhole tools of different lengths or specifications, each support column 22 has several adjustment holes distributed along its axial direction for engaging with the clamping component 11. During use, the adjustment holes of different heights can be selected according to the height of the downhole tool and the position of the ejector component to complete the adaptation with the annular support component 1, ensuring that the clamping component 12 and the clamping component 11 can act accurately at the target position, and also improving the applicability of the device.

[0028] As a further embodiment, the auxiliary frame 2 also includes a central rod 23 disposed on the base 21 for centering the downhole tool relative to the annular support 1. Specifically, the central rod 23 is vertically disposed at the center of the base 21. The downhole tool can quickly find the coaxial position between the downhole tool and the auxiliary frame 2 by engaging with the central rod 23 through its inner hole. The central rod 23 provides center positioning and support from inside the downhole tool, and together with the outer peripheral positioning and external constraint of the support column 22, it achieves dual positioning of the downhole tool, resulting in higher centering efficiency and providing limited support and restraint for the downhole tool.

[0029] As a further embodiment, the auxiliary frame 2 also includes a positioning sleeve 24 sleeved outside the central rod 23 for axial positioning of the downhole tool. When assembling or disassembling shorter downhole tools, the downhole tool can be first sleeved onto the central rod 23, so that the lower end face of the downhole tool fits against the upper end face of the positioning sleeve 24 to achieve axial positioning and support of the downhole tool. This ensures that the position of the ejected component of the downhole tool is adapted to the position of the annular support 1. Then, the engagement of the annular support 1 and the clamping member 12 restricts the ejected component of the downhole tool to a retracted state. It should be understood that the positioning sleeve 24 can be replaced as needed to achieve adaptation according to the specifications and dimensions of different downhole tools.

[0030] In another embodiment, the auxiliary frame is a cylindrical structure with a base, and its cylindrical wall has fixing holes that are evenly distributed along its circumference and correspond one-to-one with the clamping parts.

[0031] As another implementation, the positioning sleeve is threadedly connected to the center rod, and the axial positioning of the downhole tool is achieved by adjusting the axial position of the positioning sleeve on the center rod.

[0032] As another implementation, the operating end of the clamping component is set as a square structure or a hexagonal nut, etc.; of course, the clamping component can also adopt a structure that includes an operating handle.

[0033] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A downhole tool auxiliary assembly / disassembly device, comprising an annular support member with an inner diameter larger than the outer diameter of the downhole tool and a plurality of clamping members, wherein each clamping member is evenly distributed along the circumference of the annular support member and radially movably inserted onto the annular support member, characterized in that: The annular support is provided with clamping members that are evenly distributed on it for fixing it relative to the downhole tool, and the clamping members are movably arranged radially along the annular support.

2. The downhole tool auxiliary assembly and disassembly device according to claim 1, characterized in that: The downhole tool auxiliary assembly and disassembly device also includes an auxiliary frame for supporting the annular support member. The auxiliary frame includes a base, and the base is provided with a support column corresponding to the clamping member. The annular support member is connected to the support column through the clamping member.

3. The downhole tool auxiliary assembly and disassembly device according to claim 2, characterized in that: The base is provided with a center rod for aligning the downhole tool with the annular support.

4. The downhole tool auxiliary assembly and disassembly device according to claim 3, characterized in that: The center rod is fitted with a positioning sleeve for axial positioning of the downhole tool.

5. The downhole tool auxiliary assembly / disassembly device according to claim 2, 3, or 4, characterized in that: The supporting column has several adjustment holes distributed along its axial direction.

6. The downhole tool auxiliary assembly / disassembly device according to claim 2, 3, or 4, characterized in that: The circumference of the contact surface between each supporting column and the annular support is adapted to the outer circumferential surface of the annular support.

7. The downhole tool auxiliary assembly and disassembly device according to any one of claims 1 to 4, characterized in that: The clamping component is a screw, and the annular support component is provided with a threaded hole. The clamping component is connected to the annular support component through the threaded hole.

8. The downhole tool auxiliary assembly and disassembly device according to claim 7, characterized in that: At least three clamping components are provided, and each clamping component is evenly distributed along the circumference of the annular support component and is spaced apart from the pressing component.

9. The downhole tool auxiliary assembly and disassembly device according to any one of claims 1 to 4, characterized in that: The clamping member has a top pressure end that extends into the annular support member and is used to clamp and engage with the ejection part of the downhole tool, and an operating end that extends out of the outer peripheral wall of the annular support member, the operating end being provided with an operating handle.

10. The downhole tool auxiliary disassembly and assembly device according to any one of claims 1 to 4, characterized in that: The number of clamping components is adapted to the number of ejection components of the downhole tool.

Images